/*
 * Juick
 * Copyright (C) 2008-2011, Ugnich Anton
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.juick.http.www;

import org.springframework.jdbc.core.JdbcTemplate;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;

/**
 *
 * @author Ugnich Anton
 */
public class Help {

    protected void doRedirectToHelpIndex(JdbcTemplate sql, HttpServletRequest request,
                                         HttpServletResponse response) throws ServletException, IOException {
        Utils.sendTemporaryRedirect(response, "/help/ru/");
    }

    protected void doGetHelp(JdbcTemplate sql, HttpServletRequest request,
                             HttpServletResponse response) throws ServletException, IOException {
        com.juick.User visitor = Utils.getVisitorUser(sql, request, response);

        String path[] = request.getRequestURI().split("/");
        String page;
        if (path.length < 3 || path.length > 4 || path[2].length() != 2 || !path[2].matches("^[a-z]+$")) {
            Errors.doGet404(sql, request, response);
            return;
        }

        if (path.length == 4) {
            page = path[3];
            if (!page.matches("^[a-zA-Z0-9\\-]*$") || page.equals("navigation") || page.equals("index")) {
                Errors.doGet404(sql, request, response);
                return;
            }
        } else {
            page = "index";
        }

        File f = new File("/var/www/juick.com/help/" + path[2] + "/" + page);
        if (!f.isFile()) {
            Errors.doGet404(sql, request, response);
            return;
        }

        response.setContentType("text/html; charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            PageTemplates.pageHead(out, "Помощь", null);
            PageTemplates.pageNavigation(out, visitor, null);

            out.println("<aside id=\"column\">");
            printFile(out, new File("/var/www/juick.com/help/" + path[2] + "/navigation"));
            out.println("</aside>");

            out.println("<section id=\"content\">");
            out.println("<article>");
            printFile(out, f);
            out.println("</article>");
            out.println("</section>");

            PageTemplates.pageFooter(request, out, visitor, false);
            PageTemplates.pageEnd(out);
        }
    }

    private void printFile(PrintWriter out, File f) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader(f));
        String str;
        while ((str = br.readLine()) != null) {
            out.println(str);
        }
    }
}